Warp-stop-motion-assembling device



0. W. RICHARDSON. WARP STOPLMOHON ASSEMBLING DEVICE.

APPLICATION FILED APR. 10, 1919.

1,372,312. Patented Mar. 22, 1921.

UNITED STATES PATENT OFFICE.

OSCAR W. RICHARDSON, 01E WORCESTER, MASSACHUSETTS, AiSSIGNOR T0 CROMPTON 8c KNOWLES LOOM \VORKS, 0F WORCESTER, MASSACHUSETTS, A CORPORATION OE MASSACHUSETTS.

WARP-STOP-MOTION-ASSEMBLING DEVICE.

1 Application filed April 10, 1919.

bling Device, of which the "following is a specification.

This invention relates to a devicei'or use 111 assembling certain parts oi a warp stop motion of the type shown in the patent to Regan, No. 1,265,1l2dated May 7, 1918, and also in the prior application of Holmes, Serial No. 2%,268 filed August 5, 1918.

This patent and application show a form of stop motion in which the vibrator or detector bars commonly extend through openings in the upper ends of the drop wires. A change of weave or fabric frequently requires the placing of a new warp in a loom with an entire new application of drop wires thereto. The style of drop wire commonly used, has an open slot at its lower end, a wire being dropped over each warp thread after the warp is placed in the loom. It is thereafter necessary to insert the vibrator bars longitudinally through the openings in the upper ends of the drop wires. lVhen this type of stop motion is applied to. looms not especially designed to receive it, the 100m side or other parts of the loom associated therewith frequently interfere with such insertion oil the vibrator bars when the stop motion is in normalposition.

It is the object of my present invention to provide means by which certain parts of the warp stop motion may be moved to a position permitting insertion of the vibrator bars and may be thereafter returned to normal position, at all times retaining said parts in definite relative positions.

In the preferred form, myinvention com prises a support for the separator bars, for certain additional bars termed stringer bars, and for the vibrator bars. These sup ports are commonly used in pairs and provision is made for guiding them horizontally on the end frames of the stop motion from and toward the operative position of said stop motion parts.

My invention further relates to arrangements and combinations of parts hereinafter described and more particularly pointed out in the appended claims.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Serial No. 239,078.

A preferred form of my invention is shown in the drawings, in which I Flgure 1 is a side elevation of one of my improved assembling devices;

Fig. 2 is a rear elevation thereof in its initial position;

Fig. 3 shows the same parts in raised po sition;

Fig. 4t shows the assembling device moved sidewise to cooperate wit-l1 the guide formed on the end frame of the stop motion; F1gs. 5 and 6 are sectional views taken along the lines 55 and 6--6 in Fig. l;

Fig. 7 shows the position of the stop metron relative to one type of loom side;

Fig. 8 shows the type of drop wire commonly used, and

Fig. 9 is a partial perspective view of the device.

The stop motion to which my invention particularly applies comprises end frames 10 suitably supported in fixed relation to the loom sides and providing a support for a plurality of separator or guide bars 11 which extend across the loom on each side of each bank of drop wires. These bars are held in normal position by lugs 12 (Figs. 1 and 2) and by a ledge 13, the lugs and lodge being separated to form a groove 14 for a purpose to be disclosed. I Each of my improved assembling devices, 111 its preferred form, comprises a body member 15 having a series of slots 16 opening upwardly and a second series of slots 17 open at their lower ends. Each member 15 is also )rovidcd with a projection or flange 18 at its lower edge adapted to enter the groove 14 above described. A cover plate 19 is pivoted at 20 to the body member 15, and a spring latch 21 holds the plate in closed position. The plate 19 is provided with a plurality of downwardly opening slots 2:2 adapted to receive the vibrator bars as hereinafter described. A cross pin may beinserted in holes 2% in the member 15, and is then positioned transversely of the slots 17 and adjacent the lower ends of the slots 16.

A relative position of stop motion and loom side which is frequently encountered is indicated in Fig. 7, in which it will be seen that longitudinal insertion or removal oi": the vibrator bars 22 is impossible.

When. it is necessary to set up the stop motion with a new warp in such a loom, the

vibrator bars :22 in the openings in warp is placed in the loom and a wire W, such as is shown in Fig. 8, is dropped over each of the warp threads. Before thedrop wires are inserted, however, one of my assembling devices is mounted at each end of untilthe flanges 18 enter the grooves Socalled stringer bars 25 are then temporarily inserted from below in the slots 17 and are held in position therein by inserting the cross pins 23. These stringer bars are used merely for temporarily alining the drop wires in each bank as they are placed upon the warp threads.

After the drop wires are all in place, the assemblin devices are drawn rearward of the loom along the grooves 14 carrying the separator bars 11, the stringer bars 25 and the drop wires lV to a rearward position permitting longitudinal insertion of the the upper ends of the drop wires W. This position of the parts is best shown in Fig. 1.

After the vibrator bars are inserted, the

stop motion parts may be returned to initial position by sliding the devices 15 forward along the grooves 14 (Fig. at). it will be noted that the flanges 18 lit the grooves 14: so closely that the stop motion parts are firmly supported in every position of the parts.

While the vibrator bars 22 are somewhat longer than the distance between the end frames 10 of the stop motion, it is easy to move one assembling device forward slightly ahead of the other device, thus permitting one end of each vibrator bar to be inserted in its supporting opening 26 and to be moved through'the opening a suliicient distance to permitthe other end to clear the opposite end frame 10. The stringer bars are then removed, the cover plate 19 is swung back to release the vibrator bars, and the assembling devices are detached by successive sidewise and downward movements.

It will thus appear that I have provided assembling devices by which the essential V longitudinally extending parts of the stop motion may be held in definite relative posi tion while they are displaced rearwardly to permit insertion or removal of the vibrator bars. 7

Having thus described my invention, it

will be evident that changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of my invention as set forth in the claims, and I do not wish to be otherwise limited to the details disclosed, but what I claim is l. A warp stop motion assembling device comprising supports to hold the longitudinally extended removable parts of a stop motion in definite relation to each other, and means to guide said supports and said parts real-weirdly to inoperative position and forvith so d end frzune members to guide said parts .rwardly to inoperative position and forwardly to operative position while retaining a fixed relation of said parts to each othe and being also ellcctive to support said parts in both positions.

l. A warp stop motion assembling device comprising means to position separator bars. stringer bars and vibrator bars relative to (1 H Li ter; (IQ/11b r, and means to guide said parts 1 to inoperative position and for wurdly to operative position and to support said parts in both positions.

5. An assembling device for a warp stop motion having end frames con'iprising supports provided with a plurality f slots to receive separator bars, a. plurality of inverted slots to receive stringer bars, and :1 plurality of openings to receive vibrator bars, and means to hold the iger bars in said inverted slots. said supports being slidable on said end rames to guide said bars collectively to inoperative and operative positions and to support .aid parts in both positions.

In testimony whereof I have hereunto allixed my signature.

OSCAR W. RICHARDSON. 

